Experimental measurements collected by the BABAR, Belle, and LHCb experiments on different observables associated with semileptonic
Based on the generalized quantum electrodynamics expression for the Podolsky propagator, which preserves gauge invariance for massive photons, we propose a model for the massive gluon propagator that reproduces well-known features of established strong-interaction models in the framework of the Dyson-Schwinger equation. By adjusting the Podolsky mass and the coupling strength we thus construct...
We study the nonleptonic weak decays V_1→ V_2 M, where V_1 is a vector heavy meson as D_((s))^,J/Ψ,B_((s))^,B_c^*,Υ(1S); V_2 is a vector meson and M is a pseudoscalar or vector meson. We calculate the tree-level contribution to these decays given by the transition vector-to-vector, V_1 → V_2, using the covariant light-front quark model to evaluate the form factors. We find that some...
The description of some
Preliminary results about the prompt production of some heavy quarkonium states are presented, which are based on an event sample of pPb collisions at a center-of-mass energy of 8.16 TeV, collected by CMS detector during 2016 and corresponding to an integrated luminosity of 180 nb
The charmonium decay and production can be modeled using nonrelativistic QCD factorization. This factorization consists of some long-distance matrix elements and a set of constants that must be fixed by the short-distance dynamics. The current work is focused on reviewing the short distance constants’ computation for the B decays into charmonium at NLO using covariant projectors, and their...
In recent years, evidence of Lepton Flavour Universality Violation has been observed in semi-leptonic decays associated with the charged-current transition 𝑏→𝑐𝑙𝜈 ̅ by BABAR, Belle and LHCb experiments, up to 3 standard deviations (3σ). While for the neutral-current transition 𝑏𝑏 ̅→𝑙^+ 𝑙^−, the BABAR collaboration in 2020 reported a discrepancy of 1.8σ in the leptonic decay of the ϒ(3s) meson....
Heavy mesons (quarkonia) behavior is a challenge because of the limitations of the QCD theory at low energies; that is why We propose as a simple approximation to use a nonrelativistic Hamiltonian, which has two divisions: for the close interaction, the Hulthen potential and the distant interaction a root confining potential, theses contributions are neccesary to determine the mass spectra of...
The modeling of heavy hadrons into light ones’ decay modes presents a problem, the weak dynamics factorization. There are some proposals for it, for instance, the MMM (Multi Meson Model) applied to D-> KKK, models the weak part of the amplitude using D's decay constant and its momentum. This is possible as long as the main contribution to the amplitude comes from the annihilation topology, D->...
I will present a simple exploration to the physics of charmonium, i.e., mesonic states which are not simply charm - anticharm configurations. I will describe the most popular configurations proposed for these states. I will then show how these states can be produced in hadronic collisions and in heavy ion collisions, both in central and peripheral reactions.\
A review of the states for the...
Se presenta un estudio preliminar sobre la violación de la simetría CP en los decaimientos de los mesones D^+\rightarrow K^+K^-K^+\ \ y\ \ D^-\rightarrow K^-K^+K^-, donde a partir de un Monte Carlo se hace una simulación de estos decaimientos en un Dalitz Plot, y se realiza mediante el modelo Isobar un análisis de la amplitud para los decaimientos del D^+ y D^-.
The status of the current and future searches of light bosons is reviewed. I will focus on light bosons acting as the dark matter or the dark energy in the Universe
Many scenarios of physics beyond the Standard Model predict new particles with
masses well below the electroweak scale. Low-energy, high luminosity colliders such as BaBar are ideally suited to discover these particles. We present several recent searches for low-mass dark sector particles at BaBar, including leptophilic scalars, self-interacting dark matter bound states, and axion like...
Primordial black holes (PBHs) are a potential dark matter candidate whose masses can span over many orders of magnitude. If their masses lie in the
We propose a model with spin 3/2 fermions and vector doublets. We compute neutrino masses via radiative seesaw mechanism. We investigate the consequences of the model in the dark matter relic abundance. Furthermore, we implement the Casas-Ibarra parametrization to constraint the parameter space considering theoretical constraints. We also analyze the parameter space for direct detection of dark matter.
We study the possible searches of dark matter at colliders using Vector Boson Fusion topology in the context of Simplified Models signatures. We examine the possible physics reach of these searches with regard to monojet-type searches, and determine how these two signatures might be complementary.
A proposal is presented for a dark matter (DM) signal search with the Phase-2 CMS Detector at the high luminosity LHC. The model under study includes a scalar field and new particles heavy fermions. Deep neural networks are constructed for the study of the experimental signature consisting of one or two muons in the presence of lost transverse moment. The results of these models are compared...
In recent years the multicomponent scalar dark matter models with discrete symmetries
We consider a model with Left-Right symmetry with
Actualmente se considera que la materia oscura (DM) es uno de los principales componentes del universo, sin embargo, su origen y naturaleza sigue siendo una pregunta abierta, ya que la DM no forma parte del modelo estándar de las partículas elementales (SM). En este trabajo se propone que la DM se genera, no en un escalar, sino por co-aniquilación de neutrinos pesados de Majorana, a través del...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment under construction at a baseline of roughly 52.5 km from 8 nuclear reactors in China. JUNO will use an acrylic sphere containing 20 kton of liquid scintillator surrounded by about 18,000+25,000 (20-inch + 3-inch) photomultiplier tubes immersed in ultrapure water as the primary neutrino target. In...
The Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) is an above-ground antineutrino experiment at short baselines located at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL). The PROSPECT detector comprises 4-tons of Li-6 doped liquid scintillator (6LiLS) divided into an 11x14 array of optically separated segments. This experiment's physics goals...
The nuclear recoil ionization efficiency or "quenching factor" (QF) plays a crucial role in low-threshold ionization type detectors used in dark matter searches, CE
SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < 𝜂 < 8.6, complementary to all the other experiments at the LHC. The experiment is to be located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on an 800 kg target mass of...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
The second largest background of this
This work pretends to study the boosted Higgs boson calibration using Z + jets events by optimizing the signal significance after tagging this topology data with the objective that allows others to investigate this type of decay for different processes. Besides, this project also focuses on the automation of the event selection in this tagger to allow the code to be safe and robust to errors,...
Los métodos de identificación de partículas son una herramienta poderosa para filtrar datos no deseados y con ello mejorar los resultados finales del experimento. En este caso en conciso, se estudiara el rendimiento de distintos métodos de identificación de bosones W en eventos de colisiones del experimento ATLAS, tomando especial atención a los métodos basados en el llamado Plano de Lund, el...
Las actualizaciones que se están desarrollando en el LHC, permitirán un incremento de las colisiones de protones en el acelerador de partículas. El incremento de la luminosidad instantánea, permitirá investigar fenómenos físicos poco frecuentes, obtener medidas más precisas de los fenómenos ya conocidos e incluso investigar eventos más allá del modelo estándar. Satisfacer los requerimientos...
El upgrade ATLAS HL-LHC permitirá que algoritmos de reconstrucción de jets similares a aquellos utilizados de forma offline sean implementados a nivel del Trigger más bajo. Estos algoritmos tienen como objetivo reconstruir parámetros de los jets de forma precisa de tal forma que sea posible maximizar la coherencia entre los datos del trigger y aquellos seleccionados en el análisis. El...
En el mundo digital actual, los numerosos cambios transforman constantemente la forma de manejar, almacenar y distribuir datos, y el surgimiento de nuevas infraestructuras computacionales y servicios remotos posibilita realizar distintas tareas de manera virtual, sin contar con recursos computacionales sofisticados. Esto resulta especialmente útil en análisis con datos abiertos de los...
El procesamiento y análisis de datos está tomando cada vez mayor relevancia en el campo de la investigación científica, por lo que actualmente se busca facilitar el desarrollo de herramientas que realicen estos análisis sin la limitación de la infraestructura computacional personal que pueda llegar a tener un usuario. Así, el desarrollo y uso de herramientas de software que provean un servicio...
En física de partículas los algoritmos computacionales son fundamentales para seleccionar eventos interesantes para estudiar, esto se hace reduciendo la cantidad de eventos de fondo en cualquier muestra. Este proyecto intenta utilizar las muestras proporcionadas por el desafío LHC Olympics del 2020 para optimizar un análisis multivariado de tipo BDT capaz de separar los eventos de señal y...
In the process of measuring the beam status and the luminosity during the Run 3 of the Large Hadron Collider, at the interaction point of the LHCb experiment is projected the Probe for Luminosity Measurement (PLUME) detector. Through the use of Geant4 simulations, the adjacent effects to the operation point are studied by means of the Cherenkov light emitted by particles coming from the...
The High Luminosity Large Hadron Collider (HL-LHC) will produce at least 250 inverse femtobarns of data per year. In order to analyze this data, we need to produce a substantial number of events. This possesses a considerable challenge to the already-optimized full CMS detector simulation that uses Geant4. One avenue being explored is modifying the simulation parameters to process events even...
Podio is an EDM tool that generates all code from YAML descriptions. As part of the Key4Hep project it is necessary that it has some tools that are already available in the iLC software, we present advances made during the summer student project implementing tools similar to anajob and dumpevent.
In the field of High energy physics, there are many tools used to perform the statistical analysis needed to do experimental and phenomenological research in that field. Inside of the CMS collaboration, Combine tool is heavily used to produce binned statistical models. Although Combine is open source and is based in other open source tools as RootFit, RooStats and is build over HistFactory,...
In recent years there has been a reproducibility crisis in most science fields, where researchers fail to reproduce other researchers and their own experiments. In HEP, the computational analysis of the data obtained from experiments, such as the LHC, is the new concept of a experiment. The computational experiments are bounded to the environment and equipment used to perform the analysis....
This presentation describes the test beam studies of 3D silicon sensors (pitch 50x50 µm2 ) exposed to a 120 GeV proton beam at the Fermilab Test Beam Facility. We show the pixel efficiency, cluster size and hit resolution before and after irradiation. The 3D silicon sensors are considered for the innermost layers of the Inner Tracker (IT) of the Phase-2 upgrade of CMS Detector. This detector...
Forward photons and electrons in the LHCb experiment are detected with the inner modules of the EM calorimeter. However, the granularity of the cells makes difficult to detect precisely the shape of the showers produced by those particles. Then, photons and electrons candidates are hard to differentiate especially when nearly collinear particles hit the calorimeter. Simulations in Geant4 of...
Among the outstanding questions of particle physics, proof of the existence of a magnetic monopole is still one of great interest. Not only would the observation of a magnetically charged particle bring symmetry between electric and magnetic fields in Maxwell’s equations, but it would also explain the quantization of the electric charge. TeV-mass Dirac Magnetic Monopoles, which behave as a...
In this talk I will describe a theory where the Inverse seesaw mechanism is implemented not only in the neutrino sector but also in the SM charged fermion sector in order to explain the pattern of SM fermion masses. To the best of my knowledge, that model corresponds to the first implementation of the inverse seesaw mechanism for the charged fermion sector. I will discuss its implications in...
Lepton number violation (LNV) is usually searched for by the LHC collaborations using the same-sign di-lepton plus jet signature. We discuss multi-lepton signals of LNV that can arise with experimentally interesting rates in certain models of neutrino mass generation. Interestingly, in such models the observed smallness of the active neutrino masses, together with the high-multiplicity of the...
We show the analisis to one-loop light neutrino mass considering the Type-I Seesaw Model. In our work we have two parts: with and without SUSY. The mass insertion approximation method is applied to calculate the one loop corrections in SUSY considering diagrams that contain lepton number violation terms in order to observe its effects on the light neutrinos masses. In Non-SUSY case (
Cherenkov neutrino detectors offer a powerful tool to study long-lived particles that are produced in the decay of mesons from atmospheric showers. In this talk, we explain this approach by considering the lightest neutralino in the context of R parity violating (RPV) supersymmetry, and show how to use Super-Kamiokande atmospheric neutrino data to place constraints on the parameter space of...
Dark matter (DM) particles are predicted to decay into Standard Model particles which would produce signals of neutrinos, gamma-rays, and other secondary particles. Neutrinos provide an avenue to probe astrophysical sources of DM particles. We review the decay of dark matter into neutrinos over a range of dark matter masses from MeV/c2 to ZeV/c2. We examine the expected contributions to the...
The recent COHERENT collaboration results on the neutrino-nucleus coherent elastic scattering boosted the interest in this line of research. We will address some aspects of the neutrino-nucleus coherent elastic scattering, the impact of the actual measurements, the proposals for future investigations to observe this process within the standard model and beyond.
Dentro de los bloques constitutivos de la materia se encuentran los neutrinos, su estudio ha jugado un papel principal no sólo a la hora de confirmar las predicciones teóricas del modelo estándar (ME), sino también en la búsqueda de nueva física (NF). Una de las evidencias más claras de NF que tenemos hasta la fecha, se conoce como oscilaciones de neutrinos.
Actualmente la física de...
Durante esta charla presentaré los avances realizados de mi trabajo de investigación de grado. Iniciaré con una descripción de la dispersión elástica coherente neutrino-núcleo (CevNS), en particular, mostraré el desarrollo del cálculo de la sección eficaz de este proceso. Posteriormente se abordará el análisis estadístico
Para explicar los resultados experimentales de las oscilaciones de los neutrinos es necesario considerar que estas partículas sean masivas; no obstante, el modelo estándar de la física de partículas elementales, el esquema teórico más exitoso que explica con buena precisión tres de las cuatro interacciones fundamentales de la naturaleza ,asume que los neutrinos son partículas sin masa.
La...
We study the possibility of obtaining the standard model of particle physics as an effective theory of a more fundamental one, whose electroweak sector includes two non-universal local U(1)'s gauge groups.
We present a pedagogical Mathematica package, so-called SpaceMath, for Beyond the Standard Model (BSM) parameter space searches. In this first version, SpaceMath v1.0 works with the Higgs boson data (HBD). These results are the most up-to-date experimental measurements made at the Large Hadron Collider (LHC) and the expected results at future colliders, namely, High Luminosity LHC, High Energy...
we investigate the consequences of the Renormalization Group Equation (RGE) in the determination of the effective potential and the study of Dynamical Symmetry Breaking (DSB) in a massless Abelian Higgs (AH) model with N-component complex scalar field in (3+1) dimensional spacetime. The classical Lagrangian presents scale invariance, which is broken by radiative corrections to the effective...
The
El oscilador armónico es uno de los temas fundamentales que es punto de partida para el estudio de diversas ramas de la física, desde el estudio en la mecánica clásica hasta el estudio en mecánica cuántica, por tanto, ha sido estudiado exhaustivamente. En este trabajo se resuelve la ecuación de Schoringuer unidimensional en el enfoque de Madelung-Bohm para la mecánica cuántica, el ansatz que...
We review in a systematic way how anomaly free
A model is proposed where the fermionic and scalar fields are charged under a Peccei-Queen (PQ) symmetry. The PQ charges are chosen in such a way that they can reproduce mass matrices with five texture zeros that can reproduce the masses of the Standard Model (SM) fermions, the CKM matrix and the PMNS matrix. To obtain this result, at least 4 Higgs doublets are needed. As we will see in the...
In this work, we present a solution of the experimental anomaly in
The
In a model with additional U(1) gauge symmetry, free of anomalies, the mass of the active neutrinos are generated by type I see saw mechanism by introducing two right handed neutrinos. The muon and tau get mass at the tree level and the masses of the electron is generated by effective operators of dimension 7 by introducing a Lambda scale. Using a Monte Carlo, the model parameters are...
In a model with additional U(1) symmetry, anomaly free, the mass of the active neutrinos is generated by the inverse see saw mechanism. The muon and tau get masses at the tree level and the mass of the electron is generated by effective operators of dimension 7 by introducing a Lambda scale. Using a Monte Carlo simulation, the model parameters are adjusted according to the mass of the charged...
We investigate a scenario inspired by natural supersymmetry, where neutrino data is explained within a low-scale seesaw scenario. For this the Minimal Supersymmetric Standard Model is extended by adding light right-handed neutrinos and their superpartners, the R-sneutrinos. Moreover, we consider the lightest neutralinos to be higgsino-like. We first update a previous analysis and assess to...
Kinetic Misalignment Made Easy
